2019 06 05_meeting - lbl-srg/soep GitHub Wiki

Date: June 5, 2019, 8:15am-9am Pacific Times

The purpose of this meeting is to coordinate the Modelica integration for SOEP.

Join from PC, Mac, Linux, iOS or Android: https://lbnl.zoom.us/my/mwetter

Or iPhone one-tap (US Toll): +14086380968,6614042296# or +16465588656,6614042296#

Or Telephone:

Dial: +1 408 638 0968 (US Toll) or +1 646 558 8656 (US Toll) Meeting ID: 661 404 2296 International numbers available: https://lbnl.zoom.us/zoomconference?m=_h5BuJ686mPy3rWEyKf4NROxLaeOV5J8

1. Previous action items.
2. Kyle, Michael: Refactoring room air heat and mass balance.
3. EnergyPlus I/O variables.
4. Stuart: FMI-QSS.
5. Kyle, Michael: Optimica license protection.
6. Jianjun: JSON representation for OS front-end to Modelica
7. Other items

No meeting on June 19.

Branch issue1129_energyPlus_zone now works for one building for JModelica, Dymola and OpenModelica.

Branch issue1129_energyPlus_zone_fmiSignature works with building exported from JModelica as an FMU.

Kyle added FMI stubs based on feedback from FMU validator, and works on adding logging.

Next, work on

• Kyle to work on getting FMU to work in FMU validator.
• Michael to integrate fmu generation from Kyle.
• Michael to finalize and merge https://github.com/lbl-srg/soep/tree/issue47_fmiSignature
• Kyle to run through compliance checker.
• Kyle to add error handling and flag to clean temporary files.
• Kyle to provide a .so file and a idf file with 3 identical rooms.
• installer package for all three platforms.
• then implement control I/O.

1. All zones in the idf file must have a zone model in Modelica. Otherwise the simulation stops with an error.
2. If there is an HVAC system in the idf file, then EnergyPlus issues a warning, the EnergyPlus HVAC system is not simulated, but the coupled EnergyPlus/Modelica simulation proceeds.
3. For the EnergyPlus envelope, either the CTF transfer function or the finite difference method can be used.

No activity until room model is finished.

NREL should send contract within a week. Next is Modelon to make proposal for license protection.

• Add Python 3 support as Python 2.x is end of its lifetime.
• Support NREL in compiling binaries from OpenStudio through Java API.
• Ideally add binary from Modelon.
• Mac to be added next year, and Ubuntu 18.04 LTS this year (and Windows).

Compliance testing

• FFD and Python (wrong symbols)
• Numerics
  • Buildings.Fluid.Examples.FlowSystem
  • Buildings.Applications.DataCenters.ChillerCooled.Equipment.Validation.PumpParallel
  • Buildings.Examples.VAVCO2.VAVSystemCTControl
• various timeouts

Next is Objexx and Modelon to implement new specification from https://lbl-srg.github.io/soep/softwareArchitecture.html#jmodelica-integration

Mostly done with connected FMUs and event handling. Next is performance comparison for connected FMUs.

Robust handling of zero crossing implemented and tested.

For next gen branch, next is to update to actual API from Modelon.

Works on some corner cases on the cross comparison.

Next:

• Test using funnel as the default diff tool in BuildingsPy.
• Use funnel for cross comparison between dymola and jmodelica.
• Work on experiment specification.

Potential paths: Check diff to frozen library. Allow n models to be changed. Upgrade path to full OCT version (with access to cloud version in an integrated way).

Need to define the different use cases and work flows.

Use of python API makes protection much easier, is sufficient unless interactive mode is needed. Java API would be needed for interactive mode.

Jianjun to work on modelica-json parsing in Modelica rather than CDL mode.

Ongoing is dealing with replaceable models.

None.

None.

None.